Refactored rake task into a class

 - Added dumper class and moved all the logic into that class.
 - fixtures_path method is not present in Rails 3 and requires Active
   Record's 'config_load' task to be run. So removed using it in
   fixtures_path method.
Can you add a comment as to why this exception might be raised. I guess that will also explain why it is ok to eat the exception.